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run code in 300+ PHP versions simultaneously
<?php $data = [ 'c' => [ [ 'q' => 1, ], [ 'q' => 2, ], [ 'q' => 3, ], ] ]; $before = $data; foreach ($data['c'] as &$c) { } $after = $data; var_dump($before === $after); foreach ($data['c'] as $c) { } $after = $data; var_dump($before === $after);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
bool(true) bool(false)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(true) bool(false)

preferences:
167.89 ms | 402 KiB | 298 Q